Dry battery.



L. J. SCHATZEL.

DRY BATTERY.

APPLICATION FILED DEC. 19, 1910- RENEWED'JAN. 2,1915.

1,147,753. Pawnted July 2?, 1915.

WITNESSES INVENTOR I L60 J Schage 6. JMQM by LED 5'. SCEATZEL, OF EQSTUPIIA, OHIO, ASSIGNOR 0F ONE-HALF TO OSCAR V. MAUREB,

' OF CLEVELAND, OHIO.

DRY BATTERY.

Patented July 27, 1915.-

Application filed December 19,1910, Serial No. 598,183. Renewed January 2, 1915. Serial No. 807.

T all whom it may concern: I

Be it known that 1', LEO J. SCIIATZEL, a citizen of the United States, residing at Fostoria, in the county of Seneca and State of Ohio, have invented a certain new and usefollowing specification.

'lhcre being nothing in the structure ot the battery r-xi'iieh l oesire to claim herein, '1 have ion'n L1 is I 'imuanying drawing merely a sot er; upwannnatic sectional ii u of a dry cell well known commercial type.

in the drawing, 1 is the usual zinc casing forming the exter'or or" the cell, prepared. as usual, and '2 tneusuai lining of prepared blottin 3 The material 3 is a layer of sane. as frequently placed in cell. and 1 is a packing the bottom or the such as is hereinafter described arranged in the usual manner within the lining 2 on top of the layer of sand 3 around the usual. carbon electrode The. material 6 is a layer of sand arranged according to common practice above the packing material i beneath the upper portion of the blotting paper lining 2, and 7 is the usual seal of wax or other suitable material poured into the top of the zinc casing to seal up the cell and retain its contents in place.

8 is the ordinary oinding post attached to the Zinc and 9 the ordinary binding post attached to the upper end of the carbon electrode The sheet Zinc l forming the battery casing and bottom of the cell is cleaned and coated with any one of the following pastes:

Paste No. 1: Wheat flour or common starch boiled to a paste, with the following solution: (a) zinc chlorid solution in which ammonium chlorid has been dissolved, the proportions zinc chlorid, granular, one

pound, ammonium chlorid, granular, one pound.

Paste No. 2: Gelatin, dissolved to a paste, with solution marked (a) above.

Paste No. 3: Glucose,- dissolved to a paste, with the solution marked (a) above.

Paste No. 4: Zinc chlorid solution in Whichblotting paper has been dissolved until a thick, slimy paste results.

Ordinary blotting paper or any absorbent paper is then coated on one side with one of the above-menti0ne pastes and applied to the casing l in the usual manner. This absorbont lining 2is then caused to absorb as much of a solution of equal parts of zinc chlorid and ammonium chlorid as possible. The usual carbon electrode 5 is then put in place and preferably one or the other of the following mixtures, or their chemical equivalents, packed inside the casing and around the-carbon electrode.

lvlixture No. 1: Carbon Hour and manganese dioxid are mixed in equal parts, and to lllfil'l pound of this mixture two and three quarter ounces of potassium persulfate mixed, the ingredients are moistened with enough of a solution of zinc chlorid and ammonium chlorid to allow the mixture to be packed firmly.

Mixture No. 2: one pound, and potassium persulfate, four to eight ounces or more, are mixed and moistened with the above mentioned solution of zinc chloridand ammonium chlorid.

After the packing of the cell, a fine, dry glass sand 6 is poured over it and on top of this melted wax 7 is poured to seal the cell. The usual connectors 8 and 9 are then added.

Potassium persult'ute has comparativelyhigh conductiveand dissociative qualities, and this fact, taken together with its high oxidizing capacity, causes rapid depolarization, giving an initial E. M. F. of two volts, and this voltage drops much more gradually than does the voltage of the ordinary dry cell, even though the latter be initially lower. Furthermore, a cell having the potassium persulfate applied in the manner described has a capacity for rapid recuperation, even though theyoltage may have dropped quite low through continuous useof the cell. I hare found that the persulfates of the following metals are valuable for use in this connection ;bariu1n, strontium, ammonium,

Carbon flour or graphite,-

are added. When thorough1y copper, manganese, calcium, sodiuin, lithium and potassium. Of'these, however, potassiumpersulfate is the salt of persulfurio aciri which produces the most marked. results, m1 which I prefer to use.

Having thus described myinventiori,w1mt I claim is:

1.111 a dry bartery, a depolarizing com pound comprising a depolarizing salt of persulfuric acid.

' 2,111 a (iry battery, e depolarizing compounfi comprising carbon and a ciepolarizing per-sulfate.

3. In a dry battery, a depolarizing compound comprising carbon, manganese (iiOXi. 15

and a depolarizing persulfete. V 4;. In a dry battery, 21 depolarizing compound comprising potassium persul'fate.

5. In a dry battery, a depoierizing compound. comprising carbon, manganese dioxid, and potassium persulfate In testimony whereof, I hereunto afix my signature in the presence of two Witnesses.

LEO J. SCHATZEL. Witnesses:

SAMUEL WADE, 011A R. WADE. 

